Briggs 120602 type 0164 E1 6.5hp OHV on a Murray self propelled front drive.
New Carb and governor spring. Someone had the governor spring in the wrong hole on the control bracket for who knows how long thats been like that. Engine started and ran with no starting issues but rpms were 2500. I moved the governor spring to the right hole on the control bracket but is hard to start. Rpms were 3250. It did pop and smoked for the first minute on cold start yesterday after placing the governor spring on the right hole on the control bracket. Besides readjusting the valves any other ideas?